Add --config switch to gnatcheck

Also modify .gitatributes to treat company logo as a binary
because it gets in the way of pushing changes.

Issue eng/libadalang/langkit-query-language#172

.gitattributes

@@ -10,3 +10,4 @@ testsuite/ada_projects/*/*.ad[bs] no-precommit-check
 # No needs
 *.java no-precommit-check
 
+*.png -text

lkql_checker/lalcheck/gnatcheck-compiler.adb

@@ -1394,6 +1394,7 @@ package body Gnatcheck.Compiler is
       Split_Command : constant Slice_Set := Create (Worker_Command, " ");
       Worker        : String_Access := null;
       Prj           : constant String := Gnatcheck_Prj.Source_Prj;
+      CGPR          : constant String := Gnatcheck_Prj.Source_CGPR;
       Args          : Argument_List (1 .. 128);
       Num_Args      : Integer := 0;
 
@@ -1441,14 +1442,20 @@ package body Gnatcheck.Compiler is
          Args (Num_Args) := new String'(Get_Aggregated_Project);
       end if;
 
-      if RTS_Path.all /= "" then
-         Num_Args := @ + 1;
-         Args (Num_Args) := new String'("--RTS=" & RTS_Path.all);
-      end if;
+      if CGPR = "" then
+         if RTS_Path.all /= "" then
+            Num_Args := @ + 1;
+            Args (Num_Args) := new String'("--RTS=" & RTS_Path.all);
+         end if;
 
-      if Target.all /= "" then
+         if Target.all /= "" then
+            Num_Args := @ + 1;
+            Args (Num_Args) := new String'("--target=" & Target.all);
+         end if;
+      else
+         --  Target and runtime will be taken from config project anyway
          Num_Args := @ + 1;
-         Args (Num_Args) := new String'("--target=" & Target.all);
+         Args (Num_Args) := new String'("--config=" & CGPR);
       end if;
 
       if Debug_Mode then

lkql_checker/lalcheck/gnatcheck-output.adb

@@ -725,6 +725,7 @@ package body Gnatcheck.Output is
       Info (" --ignore-project-switches - ignore switches specified in the project file");
       Info (" --target=targetname       - specify a target for cross platforms");
       Info (" --RTS=<runtime>           - use runtime <runtime>");
+      Info (" --config=<cgpr>           - use configuration project <cgpr>");
       Info ("");
       Info (" -h   - print out the list of the currently implemented rules");
       Info (" -mn  - n is the maximal number of diagnoses in Stderr");